Old & Odd: Archaea, Bacteria & Protists

By far, the most abundant and diverse organisms on Earth are ___

• unicellular organisms

• multicellular organisms

• plants

• animals

Protists are organisms that make up the kingdom Protista under the domain ___

• Bacteria

• Archea

• Eukarya

• Plantae

Eukaryotic organisms, including you and the plants and fungi and animals that you know, have cells with ___

• large central vacuoles

• chloroplasts

• a nucleus

• a centrosome

Eukaryotic DNA comes in strands in the form of ___

• cytoplasm

• ribosomes

• chromosomes

• plasmids

Prokaryotic DNA is found in rings called ___

• cytoplasm

• ribosomes

• chromosomes

• plasmids

The first archaea fossils date back to ___

• 2.3 billion years ago

• 3.5 billion years ago

• 4.2 billion years ago

• 5.3 billion years ago

Methanogens, which prefer moderate environments like mud and swamps, derive their energy from ___

• hydrogen gas and carbon dioxide

• oxygen and carbon dioxide

• methane gas and swamp gas

• sulfur oxide

Which type of extremophile thrives at relatively high temperatures, even above the boiling point of water?

• methanogens

• thermophiles

• halophiles

• korarchaeota

Which group of archaea live in salty places like the Dead Sea, or the Great Salt Lake?

• methanogens

• thermophiles

• halophiles

• sodiuphiles

Which domain of life has been around for nearly 3 billion years and makes up the majority of prokaryotes on Earth?

• archaea

• bacteria

• eukarya

• fungi